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Equivalent & Substitute Parts for L77TSCG37SOL2RM8
Part Overview
The L77TSCG37SOL2RM8 is a 37-position D-Sub receptacle connector manufactured by Amphenol ICC (Commercial Products). This through-hole solder-terminated connector features female sockets with a mating-side female screwlock (M3) and is designed for signal applications requiring robust electrical connectivity. The part is currently active in production with 1059 units in stock.
D-Sub connectors of this configuration are essential in applications requiring standardized, high-density signal interconnection. Equivalent and substitute parts become necessary when addressing supply chain constraints, design revisions requiring different mounting configurations, or when alternative manufacturers' components meet identical electrical and mechanical specifications.
Substiute Parts
Key Parameters
| Parameter | Value |
|---|---|
| Connector Type | Receptacle, Female Sockets |
| Number of Positions | 37 |
| Shell Size / Connector Layout | 4 (DC, C) |
| Mounting Type | Through Hole |
| Termination Method | Solder |
| Current Rating | 5A |
| Voltage Rating | 600V |
| Operating Temperature Range | -55°C to 125°C |
| Material Flammability Rating | UL94 V-0 |
| RoHS Status | RoHS Compliant |
| Contact Finish | Gold (Flash) |
Substitute Part Grouping Explanation
Substitution of the L77TSCG37SOL2RM8 is determined by strict adherence to the following critical parameters:
Mandatory Matching Parameters:
- Connector type: Receptacle, female sockets
- Number of positions: 37
- Shell size and layout: 4 (DC, C)
- Termination method: Solder
- Contact finish: Gold
- Material flammability rating: UL94 V-0
- Current rating: 5A minimum
- Operating temperature range: Must encompass -55°C to 125°C or equivalent
Allowable Variations:
- Mounting type: Through hole variants with different flange configurations (mating-side, board-side, or unthreaded housing)
- Shell material finish: Steel with tin plating, nickel plating, or tin-nickel plating
- Contact material: Copper alloy, brass, or phosphor bronze
- Dielectric material: Thermoplastic, glass-filled variants, or polyamide compositions
- Voltage rating: Equal to or greater than 600V
- RoHS compliance status: RoHS Compliant or ROHS3 Compliant
Substitute parts are grouped by mounting configuration and flange feature type, as these determine physical board integration while maintaining electrical equivalence.
Parameter Comparison
| Parameter | L77TSCG37SOL2RM8 | 172-E37-213R001 | 172-E37-213R011 | 172-E37-213R031 | 172-E37-213R911 | A-DF 37 PP/Z | D37S24A4GL00LF | D37S24A4GX00LF | D37S24A4PL00LF | DC37S364TLF | DCM37S300N |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Manufacturer | Amphenol ICC | NorComp Inc. | NorComp Inc. | NorComp Inc. | NorComp Inc. | Assmann WSW | Amphenol ICC (FCI) | Amphenol ICC (FCI) | Amphenol ICC (FCI) | Amphenol ICC (FCI) | Amphenol ICC (FCI) |
| Connector Type | Receptacle, Female Sockets | Receptacle, Female Sockets | Receptacle, Female Sockets | Receptacle, Female Sockets | Receptacle, Female Sockets | Receptacle, Female Sockets | Receptacle, Female Sockets | Receptacle, Female Sockets | Receptacle, Female Sockets | Receptacle, Female Sockets | Receptacle, Female Sockets |
| Number of Positions | 37 | 37 | 37 | 37 | 37 | 37 | 37 | 37 | 37 | 37 | 37 |
| Shell Size / Layout | 4 (DC, C) | 4 (DC, C) | 4 (DC, C) | 4 (DC, C) | 4 (DC, C) | 4 (DC, C) | 4 (DC, C) | 4 (DC, C) | 4 (DC, C) | 4 (DC, C) | 4 (DC, C) |
| Mounting Type | Through Hole | Panel Mount, Through Hole | Panel Mount, Through Hole | Panel Mount, Through Hole | Panel Mount, Through Hole | Through Hole | Through Hole | Through Hole | Through Hole | Through Hole | Through Hole |
| Termination | Solder | Solder | Solder | Solder | Solder | Solder | Solder | Solder | Solder | Solder | Solder |
| Current Rating (Amps) | 5A | 5A | 5A | 5A | 5A | 3A | 5A per Contact | 5A per Contact | 5A per Contact | 5A per Contact | 7.5A per Contact |
| Voltage Rating | 600V | Not Specified | Not Specified | Not Specified | Not Specified | 250V | 300V | 300V | 300V | 300V | 300V |
| Operating Temperature | -55°C to 125°C | -50°C to 100°C | -50°C to 100°C | -50°C to 100°C | -50°C to 100°C | -20°C to 105°C | -55°C to 125°C | -55°C to 125°C | -55°C to 125°C | -55°C to 125°C | -55°C to 155°C |
| Contact Finish | Gold (Flash) | Gold (Flash) | Gold (Flash) | Gold (Flash) | Gold (Flash) | Gold (Flash) | Gold (Flash) | Gold (Flash) | Gold (Flash) | Gold (Flash) | Gold |
| Material Flammability | UL94 V-0 | UL94 V-0 | UL94 V-0 | UL94 V-0 | UL94 V-0 | UL94 V-0 | UL94 V-0 | UL94 V-0 | UL94 V-0 | Not Specified | UL94 V-0 |
| RoHS Status | RoHS Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | RoHS Compliant | ROHS3 Compliant | RoHS Compliant | RoHS Compliant | RoHS non-compliant |
| Product Status | Active | Active | Active | Active | Active | Active | Active | Active | Active | Active | Obsolete |
Engineering Selection Recommendations
Primary Substitutes (Recommended for New Designs):
The following parts are recommended as direct substitutes for the L77TSCG37SOL2RM8 in applications where through-hole vertical mounting with solder termination is required:
D37S24A4GL00LF and D37S24A4GX00LF (Amphenol ICC, Delta D Series) are the closest electrical and mechanical equivalents. Both maintain the full operating temperature range (-55°C to 125°C), support 5A per contact, and feature UL94 V-0 flammability rating. D37S24A4GX00LF carries ROHS3 Compliant status, making it suitable for applications with updated regulatory requirements. The primary distinction between these variants is the flange feature configuration (M3 versus 4-40 threading).
D37S24A4PL00LF (Amphenol ICC, Delta D Series) provides equivalent electrical performance with identical temperature range and current rating. This variant features an M3 flange and is RoHS Compliant.
DC37S364TLF (Amphenol ICC, D Series) meets core electrical requirements with 5A per contact and 300V rating. This part is suitable for applications where the reduced voltage specification is acceptable.
Secondary Substitutes (Panel Mount Configurations):
The NorComp Inc. 172-E series (172-E37-213R001, 172-E37-213R011, 172-E37-213R031, 172-E37-213R911) provides panel-mount alternatives with through-hole termination. These parts are ROHS3 Compliant and feature different flange configurations (unthreaded housing, board-side 4-40, mating-side 4-40, or dual-flange with board lock). Operating temperature range is reduced to -50°C to 100°C, and voltage rating is not specified. These substitutes are appropriate only when panel mounting is required and the reduced temperature range is acceptable.
A-DF 37 PP/Z (Assmann WSW Components) is a through-hole vertical mount option with tin-plated steel shell. This part carries a reduced current rating of 3A and operates within -20°C to 105°C, making it unsuitable for applications requiring the full 5A rating or extended low-temperature operation.
Obsolete Part (Not Recommended):
DCM37S300N (Amphenol ICC, DM HE508 Series) is marked as obsolete and carries RoHS non-compliant status. This part should not be selected for new designs or applications requiring regulatory compliance.
Frequently Asked Questions (FAQ)
Q: Can the L77TSCG37SOL2RM8 be directly replaced with a NorComp 172-E37 series connector?
A: Direct replacement is possible only if the application permits panel-mount configuration. The 172-E37 series connectors feature panel-mount through-hole mounting, whereas the L77TSCG37SOL2RM8 is designed for vertical through-hole mounting. Additionally, the 172-E37 series operates within -50°C to 100°C, which is narrower than the L77TSCG37SOL2RM8 range of -55°C to 125°C. Verify application temperature requirements before substitution.
Q: What is the difference between D37S24A4GL00LF and D37S24A4GX00LF?
A: Both parts are electrically and mechanically equivalent with identical current ratings (5A per contact), voltage ratings (300V), and operating temperature ranges (-55°C to 125°C). The primary difference is the flange feature: D37S24A4GL00LF features M3 threading, while D37S24A4GX00LF features 4-40 threading. D37S24A4GX00LF carries ROHS3 Compliant status, whereas D37S24A4GL00LF is RoHS Compliant. Select based on board-level mounting hole specifications and regulatory compliance requirements.
Q: Why is the A-DF 37 PP/Z not recommended as a substitute?
A: The A-DF 37 PP/Z carries a reduced current rating of 3A compared to the L77TSCG37SOL2RM8 specification of 5A. Additionally, its operating temperature range (-20°C to 105°C) does not encompass the full -55°C to 125°C range of the original part. This substitute is suitable only for applications with lower current demands and narrower temperature requirements.
Q: Is the DCM37S300N a viable substitute?
A: No. The DCM37S300N is marked as obsolete and carries RoHS non-compliant status. This part should not be used in new designs or applications requiring regulatory compliance certification.
Q: What parameters must remain constant when selecting a substitute for the L77TSCG37SOL2RM8?
A: The following parameters must remain constant: connector type (receptacle, female sockets), number of positions (37), shell size and layout (4 DC, C), termination method (solder), contact finish (gold), and material flammability rating (UL94 V-0). Current rating must be 5A minimum, and operating temperature range must encompass -55°C to 125°C or equivalent. Voltage rating must equal or exceed 600V.
Q: Can I use a substitute with a different flange feature?
A: Yes, provided the substitute maintains identical electrical specifications and the flange feature is compatible with your board-level mounting holes. The L77TSCG37SOL2RM8 features a mating-side female screwlock (M3). Substitutes with different flange configurations (such as 4-40 threading or unthreaded housing) are electrically equivalent but require verification of mechanical compatibility with your PCB design.
Q: What is the significance of RoHS Compliant versus ROHS3 Compliant status?
A: RoHS Compliant indicates compliance with the original Restriction of Hazardous Substances directive. ROHS3 Compliant indicates compliance with the updated RoHS 3 directive (2015/863/EU), which includes additional restricted substances. For applications subject to current regulatory requirements, ROHS3 Compliant parts are preferred. Both statuses indicate the part meets hazardous substance restrictions; ROHS3 represents a more current compliance framework.
Q: Are there inventory considerations when selecting a substitute?
A: Yes. Current inventory levels are provided for reference: L77TSCG37SOL2RM8 (1059 units), D37S24A4GX00LF (1502 units), D37S24A4GL00LF (1090 units), and 172-E37-213R001 (1484 units) represent the highest availability. Inventory status may influence procurement decisions for time-sensitive applications.
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